package org.neuedu.chapter10_0702.demo07;

import java.util.LinkedHashSet;

public class LinkedHashSetDemo01 {
    public static void main(String[] args) {
        LinkedHashSet set = new LinkedHashSet<>();
        set.add("hello");
        set.add(1);
        set.add(9.9);
        set.add(true);
        set.add("hello");
        System.out.println(set);
    }
}
